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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        const arr = [
        {
          name: '张三',
          salary: 10000,
        },
        {
          name: '张四',
          salary: 15000,
        },
        {
          name: '张五',
          salary: 20000,
        },
      ]
      // 计算每个人涨薪30%之后，公司需要多支出多少成本

    //   const money = arr.reduce( function(prev, cur) {
    //     return cur.salary * .3 + prev
    //   }, 0)
    const money = arr.reduce((prev, cur) => cur.salary * 0.3 + prev, 0)
      console.log(money)
    </script>
</body>
</html>